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'Then in the Before Update Event of the form, copy/paste the following: Dim msg As String, Style As Integer, Title As String Dim nl As String, ctl As Control nl = vb New Line & vb New Line For Each ctl In Me. When we enter information into the form, any fields that are tagged and left empty, will cause the following error message to be generated, and will not allow updating of the record: The above shows the record trying to be saved when the 'Birth Date' field has been left empty, and has been set to not allow missing information.

In the Before Update event procedure of the Microsoft Access form that you want to validate the data on for missing information, we can paste in the following code sample: Private Sub Form_Before Update(Cancel As Integer) 'Place an asterisk (*) in the Tag Property of the text 'boxes you wish to validate. Tag = "*" And Trim(ctl & "") = "" Then msg = "Data Required for '" & ctl. " & nl & _ "You can't save this record until this data is provided! For this we need to select the text box and from the Property window, choose the Other tab and type into the Tag property: Setting the Tag property of a text box to allow validation Repeat this process for any further fields that you need to prevent missing data from.This includes a large bunch of sample code and a complete reference guide to all the built-in validation rules in the library.If you skip the message for a validation, the default message is displayed.Behind the scenes, it uses Javascript regular expressions to check if a given number matches the pattern of phone numbers in particular country.Therefore, despite the fact that it doesn't cover all possible formats of phone number in the world, you can use the regexp validator to test a phone number in your country.